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Finding the Fourth Proportional to 870,971.01, 1,201,959 and 478,509.03

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Solution

The fourth proportional to 870,971.01, 1,201,959 and 478,509.03 is: 660,352.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,971.01 : 1,201,959 = 478,509.03 : x
  2. Step 2: Convert to fraction form
    870,971.01/1,201,959 = 478,509.03/x
  3. Step 3: Cross multiply
    870,971.01x = 1,201,959 × 478,509.03
  4. Step 4: Simplify right side
    870,971.01x = 575,148,235,189.77
  5. Step 5: Solve for x
    x = 575,148,235,189.77/870,971.01
  6. Step 6: Final answer
    x = 660,352.90

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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.