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Finding the Fourth Proportional to 870,053.15, 1,200,817.65 and 507,477

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Solution

The fourth proportional to 870,053.15, 1,200,817.65 and 507,477 is: 700,402.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,053.15 : 1,200,817.65 = 507,477 : x
  2. Step 2: Convert to fraction form
    870,053.15/1,200,817.65 = 507,477/x
  3. Step 3: Cross multiply
    870,053.15x = 1,200,817.65 × 507,477
  4. Step 4: Simplify right side
    870,053.15x = 609,387,338,569.05
  5. Step 5: Solve for x
    x = 609,387,338,569.05/870,053.15
  6. Step 6: Final answer
    x = 700,402.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.