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Finding the Fourth Proportional to 607,779.60, 912,490.20 and 355,318.80

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Solution

The fourth proportional to 607,779.60, 912,490.20 and 355,318.80 is: 533,458.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,779.60 : 912,490.20 = 355,318.80 : x
  2. Step 2: Convert to fraction form
    607,779.60/912,490.20 = 355,318.80/x
  3. Step 3: Cross multiply
    607,779.60x = 912,490.20 × 355,318.80
  4. Step 4: Simplify right side
    607,779.60x = 324,224,922,875.76
  5. Step 5: Solve for x
    x = 324,224,922,875.76/607,779.60
  6. Step 6: Final answer
    x = 533,458.05

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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.