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Finding the Fourth Proportional to 720,242,758.04, 993,386,619.12 and 619,941,905.20

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Solution

The fourth proportional to 720,242,758.04, 993,386,619.12 and 619,941,905.20 is: 855,047,810.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,242,758.04 : 993,386,619.12 = 619,941,905.20 : x
  2. Step 2: Convert to fraction form
    720,242,758.04/993,386,619.12 = 619,941,905.20/x
  3. Step 3: Cross multiply
    720,242,758.04x = 993,386,619.12 × 619,941,905.20
  4. Step 4: Simplify right side
    720,242,758.04x = 615,841,993,260,989,824
  5. Step 5: Solve for x
    x = 615,841,993,260,989,824/720,242,758.04
  6. Step 6: Final answer
    x = 855,047,810.46

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1.5x scale

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.