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Finding the Fourth Proportional to 875,657.20, 1,312,465.20 and 402,390.40

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Solution

The fourth proportional to 875,657.20, 1,312,465.20 and 402,390.40 is: 603,116.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,657.20 : 1,312,465.20 = 402,390.40 : x
  2. Step 2: Convert to fraction form
    875,657.20/1,312,465.20 = 402,390.40/x
  3. Step 3: Cross multiply
    875,657.20x = 1,312,465.20 × 402,390.40
  4. Step 4: Simplify right side
    875,657.20x = 528,123,396,814.08
  5. Step 5: Solve for x
    x = 528,123,396,814.08/875,657.20
  6. Step 6: Final answer
    x = 603,116.60

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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.