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Finding the Fourth Proportional to 874,891,215.40, 1,312,336,823.10 and 808,378,421.80

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Solution

The fourth proportional to 874,891,215.40, 1,312,336,823.10 and 808,378,421.80 is: 1,212,567,632.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,891,215.40 : 1,312,336,823.10 = 808,378,421.80 : x
  2. Step 2: Convert to fraction form
    874,891,215.40/1,312,336,823.10 = 808,378,421.80/x
  3. Step 3: Cross multiply
    874,891,215.40x = 1,312,336,823.10 × 808,378,421.80
  4. Step 4: Simplify right side
    874,891,215.40x = 1,060,864,769,927,603,584
  5. Step 5: Solve for x
    x = 1,060,864,769,927,603,584/874,891,215.40
  6. Step 6: Final answer
    x = 1,212,567,632.70

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.