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Finding the Fourth Proportional to 877,478.40, 1,315,342.80 and 403,336.80

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Solution

The fourth proportional to 877,478.40, 1,315,342.80 and 403,336.80 is: 604,603.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,478.40 : 1,315,342.80 = 403,336.80 : x
  2. Step 2: Convert to fraction form
    877,478.40/1,315,342.80 = 403,336.80/x
  3. Step 3: Cross multiply
    877,478.40x = 1,315,342.80 × 403,336.80
  4. Step 4: Simplify right side
    877,478.40x = 530,526,155,855.04
  5. Step 5: Solve for x
    x = 530,526,155,855.04/877,478.40
  6. Step 6: Final answer
    x = 604,603.09

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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.