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Finding the Fourth Proportional to 615,319.20, 921,985.20 and 348,285.60

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Solution

The fourth proportional to 615,319.20, 921,985.20 and 348,285.60 is: 521,866.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,319.20 : 921,985.20 = 348,285.60 : x
  2. Step 2: Convert to fraction form
    615,319.20/921,985.20 = 348,285.60/x
  3. Step 3: Cross multiply
    615,319.20x = 921,985.20 × 348,285.60
  4. Step 4: Simplify right side
    615,319.20x = 321,114,168,573.12
  5. Step 5: Solve for x
    x = 321,114,168,573.12/615,319.20
  6. Step 6: Final answer
    x = 521,866.00

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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.