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Finding the Fourth Proportional to 870,047.95, 1,200,810.57 and 507,471.81

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Solution

The fourth proportional to 870,047.95, 1,200,810.57 and 507,471.81 is: 700,395.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,047.95 : 1,200,810.57 = 507,471.81 : x
  2. Step 2: Convert to fraction form
    870,047.95/1,200,810.57 = 507,471.81/x
  3. Step 3: Cross multiply
    870,047.95x = 1,200,810.57 × 507,471.81
  4. Step 4: Simplify right side
    870,047.95x = 609,377,513,425.03
  5. Step 5: Solve for x
    x = 609,377,513,425.03/870,047.95
  6. Step 6: Final answer
    x = 700,395.32

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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.