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Finding the Fourth Proportional to 553,595.12, 763,964.16 and 311,888.24

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Solution

The fourth proportional to 553,595.12, 763,964.16 and 311,888.24 is: 430,407.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,595.12 : 763,964.16 = 311,888.24 : x
  2. Step 2: Convert to fraction form
    553,595.12/763,964.16 = 311,888.24/x
  3. Step 3: Cross multiply
    553,595.12x = 763,964.16 × 311,888.24
  4. Step 4: Simplify right side
    553,595.12x = 238,271,437,285.48
  5. Step 5: Solve for x
    x = 238,271,437,285.48/553,595.12
  6. Step 6: Final answer
    x = 430,407.40

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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.