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Finding the Fourth Proportional to 570,278.55, 786,931.08 and 340,790.30

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Solution

The fourth proportional to 570,278.55, 786,931.08 and 340,790.30 is: 470,258.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,278.55 : 786,931.08 = 340,790.30 : x
  2. Step 2: Convert to fraction form
    570,278.55/786,931.08 = 340,790.30/x
  3. Step 3: Cross multiply
    570,278.55x = 786,931.08 × 340,790.30
  4. Step 4: Simplify right side
    570,278.55x = 268,178,474,897.87
  5. Step 5: Solve for x
    x = 268,178,474,897.87/570,278.55
  6. Step 6: Final answer
    x = 470,258.74

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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.